<!DOCTYPE html>
<head>
  <meta name="viewport" content="width=device-width, minimum-scale=1">

  <style>
    body {
      margin: 0px;
    }
    iframe {
      border-width: 0px;
    }
  </style>
</head>
<body>
  <iframe width="300px" height="300px" src="scrollable-iframe.html"></iframe>
</body>
